<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<style>
    div{
        width: 800px;
        height: 300px;
        border: 3px solid red;
        margin: 0 auto;
        border-radius: 30px 50px 70px;
    }
</style>
<body>
<div></div>
</body>
</html>